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Finding the Fourth Proportional to 65.80, 99.10 and 60.76

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Solution

The fourth proportional to 65.80, 99.10 and 60.76 is: 91.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.80 : 99.10 = 60.76 : x
  2. Step 2: Convert to fraction form
    65.80/99.10 = 60.76/x
  3. Step 3: Cross multiply
    65.80x = 99.10 × 60.76
  4. Step 4: Simplify right side
    65.80x = 6,021.32
  5. Step 5: Solve for x
    x = 6,021.32/65.80
  6. Step 6: Final answer
    x = 91.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.